I have already recommended these leggings to a friend of mine who is also pregnant. They are thick and not sheer at all. They stay put ALL day! No joke, this includes when bending or squatting. The macrame at the bottom is a cute feature as well.
I normally would wear a small or medium in leggings and ordered a small. They fit really well and I think I could have ordered either size and been just fine.

Exactly what you want and expect. I wish they had them in more colors.

I'm a legging fanatic and these leggings are fantastic! The fit and quality is perfect. It's a somewhat thicker pant which makes me more comfortable in. The crotch is actually flattering and you do not feel like you're on display! Point of reference: I purchased size 1; I'm 15 weeks at 112 lbs and there is definite room to grow without looking like it.

I ordered these leggings in my first trimester before even showing - i loved them before the belly, now almost 7 months i love them with my belly even more. i have 2 pair since i wear them pretty much every day i'm not working. I am 5'3" and was 128 pre-pregnancy and ordered a size 1 and they're perfect..and still perfect as i'm growing and have room to grow. I don't agree with the sagging crotch comments, i just pull mine all the way up to my bra or fold them down, no complaints! I have seriously told every expecting friend that i have about these. Not too thin to where they're see-through and not to thick to where they're hot.